Group: Members
Posts: 159
Joined: 29-May 06
Member No.: 18,290
Location: Oregon USA
Drives: 2002 Accent Status: OFFLINE
Check the intake duct clamps (esp. at Mass Air Flow sensor) near the air cleaner. The duct will likely be loose. If the clamps are the wire type, then you'll need to update/upgrade them to worm clamp type. There is a TSB that addresses this (TSB No. 05-20-003-1). The dealership should stock these new clamps.
Group: Members
Posts: 387
Joined: 7-June 08
Member No.: 46,545
Location: Louisiana, USA
Drives: 2008 Hyundai Accent SE 1.6L Automatic Status: ONLINE
It's not going to be the transmission. In all likelihood it's the air intake clamps mentioned above. It's a known problem and is covered in the TSB. In any case, it's covered under your warranty so take it to the dealer and have it fixed.